21898989

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{11213}}^1$

素因数の和:11257

約数の個数: 24

約数和(自身を含む): 37320192

約数和(自身を除く): 15421203

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 11213, 33639, 78491, 100917, 235473, 347603, 706419, 1042809, 2433221, 3128427, 7299663, 21898989]

約数ペア:

[(1, 21898989), (3, 7299663), (7, 3128427), (9, 2433221), (21, 1042809), (31, 706419), (63, 347603), (93, 235473), (217, 100917), (279, 78491), (651, 33639), (1953, 11213)]